android -- 儲存byte

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public static String byteArrayToHexStr(byte[] byteArray) {        if (byteArray == null){            return null;        }        char[] hexArray = "0123456789ABCDEF".toCharArray();        char[] hexChars = new char[byteArray.length * 2];        for (int j = 0; j < byteArray.length; j++) {            int v = byteArray[j] & 0xFF;            hexChars[j * 2] = hexArray[v >>> 4];            hexChars[j * 2 + 1] = hexArray[v & 0x0F];        }        return new String(hexChars);    }    public static byte[] hexStrToByteArray(String str)    {        if (str == null) {            return null;        }        if (str.length() == 0) {            return new byte[0];        }        byte[] byteArray = new byte[str.length() / 2];        for (int i = 0; i < byteArray.length; i++){            String subStr = str.substring(2 * i, 2 * i + 2);            byteArray[i] = ((byte)Integer.parseInt(subStr, 16));        }        return byteArray;    }

 

android -- 儲存byte

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